Invalid file Please help !!!

Hi Guys, Gals and others,
Recently I have had an issue with Nod32 V2 showing the following message after a download. (Log below).

Path C:\Downloads\flashbrand2-tutor.exe\ is invalid.

The site is password protected, however, my Getright program (and Windows download) remembers the password, and starts to download the relevant file. After the download, Nod32 scanner operates, and then gives the above message. The file shows in my download folder as 0 bytes, even though the file is at least 5Mb.

I have fiddled with the settings/options and still receive the same message,
but Only from this web page. Some files from the same site download O K, and other files from other password/non password sites download fine.